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US 4,046,016 AGranted
Molten steel samplers
OwnerRobert J. Hackettinventor
Life of this patent
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OwnerRobert J. Hackettinventor
Estimating the term…
Immersion samplers for taking disc samples and pin samples, from heats of molten steel, alloys or other metal in basic oxygen furnaces, electric furnaces and open-hearth furnaces, are provided with slotted riser vent tubes serving to retard the escape of atmospheric air displaced by the inflowing molten metal entering the deeply immersed sampler while maintaining ample cross-sectional venting area despite accumulated droplets of spattered molten metal solidifying and blocking the vents. For use with melts of unkilled steel, apertured de-oxidizing retort portals are provided at the entrance end of the samplers with protective slag covers and vent apertures, creating a substantial de-oxidizing zone for the melt entering the sampler while releasing entrapped air during the sampler's immersion, and also allowing draining of the melt from the portal upon withdrawal of the immersed sampler from the furnace.
A hollow, heat-insulated sampler for deep immersion in molten metal comprising:
A hollow, heat-insulated sampler for immersion in molten metal comprising a hollow sampler chill mold having an entrance end temporarily closed by a metal cap, and a porous heat-insulating concave ceramic portal surrounding the open entrance end temporarily closed by the metal cap, and having vent means adjacent to the entrance end and temporarily closed by slag cover means, and an enlarged open entrance opposite the vent means which is temporarily closed by a fusible de-oxidant lid.
A hollow, heat-insulated sampler for immersion in molten metal comprising a hollow sampler chill mold having an entrance end temporarily closed by a protective cap, and a porous heat-insulating concave ceramic portal surrounding the open entrance end temporarily closed by the protective cap, and having vent means adjacent to the entrance end and temporarily closed by slag cover means, and an enlarged open entrance opposite the vent means which is temporarily closed by a protective entrance lid, enclosing fusible de-oxidant material within the concave portal.
Dependencies are inferred from the claim text.